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Lifetime measurements in rare-earth ions by time-resolved laser spectroscopy

Henri-Pierre Garnir, Émile Biémont, Thierry Bastin +6 more

Jan 1, 20000 citations

A simple method to measure the lifetime of excited levels of rare earth ions: application to erbium ions in fluorophosphate glasses

M. Brunel, Marc Vallet, Fabien Bretenaker +4 more

Optical MaterialsMar 1, 199617 citations

Excitation of resonance radiation by low-energy collisions between alkali-earth ions and rare-gas atoms

О. Б. Шпеник, V. L. Ovchinnikov, I. P. Zapisochnii

Ukrainian Journal of PhysicsDec 1, 19740 citations

Lifetime measurements for excited states of rare-earth atoms using pulse modulation of a cw dye-laser beam

Martin G. H. Gustavsson, Hans Lundberg, L. Nilsson +1 more

By pulse-modulating a cw dye-laser beam and employing the delayed-coincidence technique, we have determined the natural radiative lifetimes of a number of atomic states in rare-earth atoms Eu, Dy, and Yb. In the measurements, which were performed on an atomic beam, exponential decay curves with good statistics were obtained using short measuring times. The general features of the technique are discussed. When possible, oscillator strengths are deduced and compared with literature values.

Journal of the Optical Society of AmericaJul 1, 197967 citations

Ancilla-mediated qubit readout and heralded entanglement between rare-earth dopant ions in crystals

Kamanasish Debnath, Alexander Holm Kiilerich, Klaus Mølmer

Due to their long excited-state lifetimes, rare-earth ions in crystals are widely used in quantum applications. To allow optical readout of the qubit state of individual ions, we propose to dope the crystal with an additional nearby ancilla ion with a shorter radiative lifetime. We show how a Bayesian analysis exhausts the information about the state of the qubit from the optical signal of the ancilla ion. We study the effects of incoherent processes, and we propose ways to reduce their effect on the readout. Finally, we extend the architecture to ions residing in two remote cavities, and we show how continuous monitoring of fluorescence signals from the two ancilla ions leads to entanglement of the qubit ions.Due to their long excited-state lifetimes, rare-earth ions in crystals are widely used in quantum applications. To allow optical readout of the qubit state of individual ions, we propose to dope the crystal with an additional nearby ancilla ion with a shorter radiative lifetime. We show how a Bayesian analysis exhausts the information about the state of the qubit from the optical signal of the ancilla ion. We study the effects of incoherent processes, and we propose ways to reduce their effect on the readout. Finally, we extend the architecture to ions residing in two remote cavities, and we show how continuous monitoring of fluorescence signals from the two ancilla ions leads to entanglement of the qubit ions.

arXiv:2007.02866Physical Review AApr 8, 20215 citations

Approximate calculation of the radiative lifetimes of excited states of atoms and ions

Pavel Bogdanovich, G. L. Zhukauskas, Alina Momkauskaitė

OptSpApr 1, 19880 citations

Natural radiative lifetime measurements of rare-earth atoms and ions

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